diff --git a/docs/compaction-refresh/probes/p3_d4_focused_run.py b/docs/compaction-refresh/probes/p3_d4_focused_run.py
index b256888..222b864 100644
--- a/docs/compaction-refresh/probes/p3_d4_focused_run.py
+++ b/docs/compaction-refresh/probes/p3_d4_focused_run.py
@@ -512,6 +512,7 @@ def launch_verified_pi(
         sys.executable,
         # -s preserves sys.path[0]=pinned/ for the launcher's sibling helper.
         "-s",
+        "-S",
         "-B",
         str(launcher),
         "--runtime",
@@ -550,6 +551,7 @@ def launch_verified_broker(
     command = [
         sys.executable,
         "-I",
+        "-S",
         "-B",
         str(broker_path),
         "--socket",